Thread-cutting device for looms



Jan. 15, 1929. 1,699,442

R. R. NIX ET AL THREAD CUTTING DEVICE FORl LOOMS Filed Jan. 25, v'1926INVENTOR dan.. 15,

@site i orties,

RANDOLPH RAY N 1X AND WALTON FRANKLIN EAVIS, 0F SHELBY, N'Gl'l CARLE'NA.

THREAD-CUTTING Application led January rihis invention relates toimprovements in thread cutting devices for looms and has for its objectthe provision ot a device for permitting the cutting oil or" the'threads which entend beyond the selvage edge or a woven cloth.

The primary object ol the invention is to provide a device 'for thispurpose in which the cutting edges ot the thread cutter change at eachoperation ofthe temple roll, so that a new and sharp cutting edge ispresented and eiticient operation of the cutting device is thus insured.

Another object of the invention is to provide a thread cutter for loomshaving two coaXially mounted cutting members provided with peripheralnotched teeth closely related with cutting edges to eiiect a shearingcut on opposite relative motion and providing a clutch between thecutting members to permit them to run relatively free in one movement ofdirection of the temple roll.

The invention therefore may be deined broadly as a threadcutter forvibratory templesg'said cutter having two coacting members each providedwith notched cutting edges7 said members being so connected with thetemple that they are both driven by it in one direction, but one is freefor movement in the other direction. It comprises other more specificfeatures, the novelty of which will be hereinafter described and will bedeiinitely indicated in the appended claims.

ln the drawings l ligure 1 is a front elevation illustrating the loomtemple with the invention applied;

.Figure 2 is a section on the line 2--2 of Figure 1;

Figures 3 and l are opposite face views of the cutter member havingmovement in one direction only;

Figures 5 and 6 are similar viewsof the cutting member carried by theroll.

Referring now in detail to the drawings wherein like characters ofreference indicate corresponding parts7 10 indicates a temple roll whichis mounted upon journals 11 and 12 at opposite ends thereof. Thesejournals are located at the opposite ends of the pod 13 and constituteusting screws to form a pivotal point for the roll in the usual manner.

The thread cutter comprises a pair of steel disks 14 and 15 each ofwhich is provided with a plurality of peripheral notches formingabutting teeth 16 through which notches the selvage thread passes to besevered when DEVICE FOR LOOMS.

23, 1926. Serial No. 83,2289.

there is a change in bobbins. rlhe member 14 is secured to and movablewith the temple roll by the screws 17. rlhe temple roll rotates freelyon the journals 11 and 12 and the confronting edges ot the several teethare sharpened to aiiiord on relative movement of the disks a shearingcut ot the threads. A vul canized rubber washer 18 bears against thecutter member and holds the entire temple roll seated against the rearend or the .pod 13 under pressure by reason of the rubber washer 18 andthe adjustment of the screws 11 and 12, thus effecting an elasticengagement between the two disk cutters by adjusting the journal 12 anda very elastic engagement between the. cutting disks is thus effected.The adjusting screws 11 and 12 are shown driven home and no furtheradjustment is possible with the screws in the position shown, but withthe screws not seated so deeply, then upon further advance of thescrews7 adjustment between the disks 14 and 15 is effected. In thehollow space between the two cutters is housed a dog 2O pivotallymounted with relation to the member 14 on one of the screws 17, theelastic tip of which, as indicated at 20a in Figure 6 iits against aprojection 2Gb and the tip 20c of the dog 2O is broad enough to lie inthe plane or a plurality 0i radial abutments 19 on the inner tace of thecompanion disk 15 in such relation that when movement of the member 14is etfected in one direction the portion 2Oc of the dog will ride overthe sloping edge of the circumferential abutment 19 but it will check itin the opposite direction and the edge of the dog will catch and find aseat on the right angular edge oit the abutment.

It will thus be seen that the rotation oit the temple roll in onedirection will cause the two shearing disks to move in'unison but whenrotated in the opposite direction the dog will ride over the sloping'edges of the abutment 19,*thus carrying the member 14 relatively to themember- 15 and producing a cutting action, the new cutting teeth beingbrought into use by both of the disks moving in unison. In

other words, with the cloth moving normally through the temple roll thedog at times engages the radial projections 19 and moves the two disksin unison., but the back and forth motion of the cloth causes a relativemotion between the two disks for a great portion oi the time and it isonly at times that the two disks are moved in unison to present newcutting teeth. Thus by automatic action of the llo All)

temple roll a keen cut ot the thread is always effected due to the largenumber of peripheral teeth, thus assuring a relatively long life ot theshapened teeth and necessitating less removal of same tor sharpening,The travel oil the cloth through the temple pod will cause the burr l0to rotate in one direction and this will not affect the movement of thecutting member l5 and the portion 20c ot the dog will ride over thesloping edges of the peripheral projections 19, but each time the clothmoves in the opposite direction through the temi le pod there will beproduced a back action and the burr lO being in engagement with thecloth will cause this burr l0 to move in. the opposite direction andwhen the portion 20C is litting against the right angle portion ot theprojection 19 or any one or them, there will be imparted a partialrotation to the member l5, and thus a new set ot cutting teeth will bepresented on this member.

rlhe .invention` is susceptible ot various changes in its form,proportion and minor details ot construction and the right is hereinreserved to make such changes as properly tall within the scope ot theappended claims..

We claiml. A thread cutter tor vibratory temples, said cutter having twocoacting members, each provided with notched cutting edges, said membersso connected with the temple that they are both driven by it in onedirection, but one is tree torinovement in the other direction andprovided with means to permit such movement.

2. A. thread cutter tor vibratory temples, said cutter having twocoacting members, each provided with notched cutting edges, said membersbeing so connected with the temple that they are both driven by it inone direction, but one is tree Jfor movement in the other direction andprovided with means to prevent such movement.

3. A thread cutter for loom temples com-V prising toothed concentricthread cutting members, one ot the thread cutting members being liXed tothe temple roll and the other thread cutting member being rotatable withrelation lto the temple roll, means for holdingl the thread cuttingmembers in shearing rela'- tion, and meanstor operating the threadcutting members as a unit in one direction of roll movement, andseparately in opposite direction of roll movement.

el. A. loom temple carrying two coaxial multiple toothed thread cuttinmembers, one ot the members being lined to the temple roll to rotatetherewith, and the ot ier member being resiliently mounted in thetempley and having a slip connection with the member on the temple roll,the two members being held in elastic engagement with each other toprovide a shearing cut, the slip connection between the memberscomprising a dog positioned between the two outing members to lock thetwo members together in one direction of roll movement and to sliprelatively in an opposite direction o'l' roll movement.

5. The combination with a loom temple having a thread cutting deviceincluding two multiple toothed cutting members, one ot the members beingattached to the temple roll, the other member being secured in aresilient manner in the temple, both members being adapted to rotatetogether in one direction of roll movement, and means to release one ofthe cutter members from rotation and to hold the same stationary whenthe roll is rotated n in the opposite direction.

6. The combination with a loom temple having a thread cutting deviceincluding two cutter members with peripheral multiple shearing teeth,means to attach one of the cutter members to the temple roll to rotatetherewith, means tor resiliently holding the other cutter member in thetemple, and a dog positioned between the cutter members adapted to lockthe members together in one direction ot roll movement and to permit arelative shifting of cutter members in au opposite direction of rollmovement.

7 A loom temple carrying two coaxially mounted thread cutting memberswithmultiple radial shearing teeth, one member having a lixed relationto the temple rollV and the other member being resiliently mounted inthe temple to prevent rotation withthe irst cutting member in onedirection ot roll movement, and a slip connection between the twocutting members adapted to become operative to shift the two members inunison on opposite direction ot roll movement.

8. In a loom temple, a temple roll, a multiple toothed cutter secured onone end ot the temple roll, a second multiple toothed cutter resilientlysecured in the temple and being Y adapted to press against the firstcutter and being held against rotationl in one direction,

' slip connections between the two cutter members to allow relativemovement in onedireetion ot rollY movement between the cutter membersand to allow unitary movement ot the cutters in another direction otroll movement.V

In testimony whereof we atliX our signa- RANDOLPH RAY NIX; Y WALTONFRANKLIN DAVlS.

' tures.

